1. Come, let us sing to the Lord; let us raise our voices in jubilation to the Rock of our deliverance.
2. Let us approach Him with thanksgiving; let us raise our voices to Him in song.
3. For the Lord is a great God, and a great King over all supernal beings;
4. in His hands are the depths of the earth, and the heights of the mountains are His.
5. Indeed, the sea is His, for He made it; His hands formed the dry land.

Tehillim Ohel Yoseph Yitzchok (Kehot Publication Society)

Tehillim is recited by Jewish people collectively and individually, as the desire occurs to offer praise and thanksgiving to G-d; or alternitavely, in times of crisis and need, as a form of supplication, and even as a venue to express regret for sin.

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6. Come, let us prostrate ourselves and bow down; let us bend the knee before the Lord, our Maker.
7. For He is our God, and we are the people that He tends, the flock under His [guiding] hand-even this very day, if you would but hearken to His voice!
8. Do not harden your heart as at Merivah, as on the day at Massah in the wilderness,
9. where your fathers tested Me; they tried Me, though they had seen My deeds.
10. For forty years I quarreled with that generation; and I said, "They are a people of erring hearts, they do not know My ways.”
11. So I vowed in My anger that they would not enter My resting place.